Malicious RTF — malware analysis report

Static analysis result for SHA-256 868b8e9c4b1fb43f…

MALICIOUS

RTF

107.7 KB Created: 2021-07-16 07:42:00
MD5: 62034750b340f18dff350be045e376b7 SHA-1: 84c5ad584648e1050239b40ddc9b5482fcc4b26d SHA-256: 868b8e9c4b1fb43f565d4cf2e7b16ea56adfb4db1f87f666e8e36dd9a32a7387
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution when the malformed object is processed. The embedded URL is benign and does not appear to be directly involved in the exploit.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003305.bin
184e1c2b06d0ceb3f70ff189c060b791cc1e77718a96019e4468c76a14f9a931		 rtf-objdata-decoded RTF \objdata at offset 0x3305 3333 bytes

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